Stop mechanism for doubling-machines



(No Model.) 3 Sheets-Sheet 1.

R. DAWSON.

STOP MECHANISM FOR DOUBLING MACHINES. No. 408,874. I Patented Aug. 13,1889.

WI-r JEE E-E IHVEZHTDK (No Model.) a Sheets-Sheet 2. R. DAWSON. STOPMECHANISM FOR DOUBLING MAGHINES.

No. 408,874. Patented Aug. 13, 1889.

WITPI EEEaF E'; INVEHTDR Zlih m,

(No Model.) 3 sheet -sheet s.

R. DAWSON.

STOP MECHANISM FOR DOUBLING- MACHINES.

No. 408,874. Patented Aug. 13, 1889.

I I V///////////?//////////,

Wrrpl Est-1E5.

N PETERS, PIwwLilho rn bnr, Walhinglon. 11c.

UNITED STATES PATENT OFFICE.

ROBERT DAWVSON, OF FRAMINGHAM, MASSACHUSETTS.

STOP MECHANISM FOR DOUBLlNG-MACHINES.

SPECIFICATION forming part of Letters Patent No. 408,874, dated August13, 1889.

Application filed January 19, 1889. Serial No. 296,817. (No model.)

To all whom it 77mg concern.-

Be it known that I, ROBERT DAWSON, a citizen. of the United States,residing at Framingham, in the county of Middlesex and Commonwealth ofMassachusetts, have invented a new and useful Stop Mechanism forDoubling-Machines, of which the following is a specification.

My invention relates to an improvement in redoubling mechanism, in whichimprovement the automatic stops operate in 0011- junction with thespools from which the worsted is drawn and with the spool upon which theyarn is wound; and the objects of my improvement are, first, to providean improved adjustable automatic stop for the winding mechanism, and,second, to secure uniformity by automatic actionin the amount of yarnwound upon the spool. I attain these objects by the mechanismillustrated in the accompanying drawings, in which- Figure 1 is across-sectional view of one head of my machine in operation. Fig. 2 is asectional view of one head not in operation, omitting an upper guide,shown in Fig. 1.

Fig. 3 is a view of the frame containing the.

spool and stop, and it shows, by omitting one arm of the yoke whichsupports the spool, the roll and stop, and, incidentally, one end of thearm, which, by contact with the stop, releases the weight shown in Figs.1 and 2 and lifts the frame away from the drum, stopping the head. Fig.4. is a sectional view of the roll, yoke, and supporting screwrod andshowing the spool in elevation. Fig. 5 is a hori: zontal section on line00 00, Fig. 2. Fig. 6 is a plan of the three spools from which theworsted is drawn, the three detectors, the spool upon which the yarn iswound, the drum, and, in general terms, of one head of the machine,omitting certain guides suffieiently shown in Fig. 1. Fig. 7 is a planof the detectors and of the revolving shaft, which, by means of the barssurrounding it, contacts with the detector whenever, by the breaking orrunning out of a thread, as hereinafter described, that detector isreleased and drops; and Fig. 8 is a horizontal sectional view on line yy, Fig. 2.

Similar letters designate similar parts in the several drawings. w

I am familiar with the United States patents to J. Boyd, No. 236,766,January 18, 1881, and to J. and T. A. Boyd, No. 236,767, January 18,1881, and I regard my invention as an improvement on the devices thereinpatented, and on other similar devices.

In my invention the motion is imparted to the various parts of themechanism in the usual and familiar manner. The thread, however, isevenly distributed upon the spool, not by the to-and-fro or up-and-downmove ment of the spool, but by the movement of the traverseguide. Thethread is passed from each of the three spools A, Fig. 6, over the rodB, through the three detectors 0, Fig. 6, through the button or guide D,Fig. 1, through the traverseguide E to and upon spool F, which isrevolved until said detectors 0 are raised by the tension of the thread.Then lever G, pivoted at S and attached to frame X by a strap, as shown,is depressed by hand, raising weight H,to which it is attached, asshown, so that wedge-shaped detent h thereon is caught and held up bysupporting-latch I on the lower part of bar J. Bar J is pressed againstweight II by spring K, which gives bar J a quick return when weight Hisraised. This lifting of weight l-I permits frame 'X, car- Tying spool Fand adjustable stop 0, (which frame is an overbalanee pivoted at L andheretofore kept up by weight 11,) to fall by its own weight into contactwith drum M. The roll 0 and its wedge 0 form in reality a section of aneccentric, and these two, in connection with an arm P, (with or withoutfriction-rolls p at the end,) form together a rotatory trip 0 P, for acomplete eccentric is merely a double rotatory wedge or a wedge wrappedaround an axis. Drum M revolves from left to right, causing spool F, nowin contact with it, to revolve from right to left. Traverse-guide Emoves to and fro, about, over, and parallel with the center of spool Fin a range of motion equal to the interior dimensions of spool F, sothat the three threads passing as one through said traverse guide aredrawn off evenly upon said spool F, filling it level from end to end toa fullness such as the operator may desire, in order that when thisfullness is reached the stop-motion shall be operated.

IOO

The operator adjusts the roll 0 vertically beneath the spool 11, so thatwhen the desired fullness is reached the wedge 0 on roll 0 shall come incontact with the surface of the yarn wound upon spool 1 In order to dothis, roll 0 is mounted in a yoke O, which yoke is provided withascrew-stem 0", rigidly at tached to the base or middle arm of the yokeF, carrying roll 0, and passing through. the end of the overbalance orframe X. Two nuts N and N are engaged with this screw-stem, the one N atone end and the other N at the other end of the socket, Fig. it. Bymoving these nuts up and down upon the stem the height of roll 0 can beadjusted at the will of the operator, and thus the thickness of the yarnwound upon the spool is gaged beforehand. at the desired fullness foraetuatingthe stop-motion. \Vhen the yarn upon the spool 1 comes incontact with wedge 0 on roll 0, the spool I rotates roll 0 by frictionalcontact with wedge o and raises arm I, which is rigidly attached to saidroll 0 until roll 2), Fig. 3, comes in contact with bar Q, pivoted at U.This contact lifts (Fig. 5,) the roll 1* on the other arm V of the leveragainst bar I and. spring K, removing supportlug-latch I and releasingweight Ii. In falling weight It raises frame X, pivoted at L, out ofcontact with drum M, and the machine reassumes the position shown inFig. 2. If in operation one of the threads from spools A, Fig. (3,should break, or it the thread on one of said spools should run out, thedetector through which such thread had been passing would drop and theprojecting bar 2' on revolving shal't R would come into contact withsaid detector, pushing the upper part of bar J, carrying said detectors,toward drum M, and the lower part of bar J, which bar is pivoted at 7',against spring K, supporting-latch I would. be removed, wedge-shapeddetent 71 would be released, and weight ll would drop in its ways,raising spool F from drum M and stopping the head, as described whenroll 0 acts.

It will be observed that; whether the fall. of weight ll, stopping thehead, is caused by the action of the lever having its fulcrum at U or bythe action of the lever having its fulcruin at j the non-acting lever ismoved, as if acting, by the result of the other levers action, and thatidentically the same mechanical result as distinguished from cause, isproduced in either event.

\Vhat I claim, and desire to secure by Let ters Patentot the UnitedStates, is-

1. The combination of drum M, frame X, adapted to carry a spool andconnected with the weight .lI, weight ll, provided with wedgeshapeddetent 71., latch I, adapted to engage with said detent, pivoted bar J,and detectors U, with shaft R, having the small bars 0, substantially asdescribed, and for the pur poses set forth.

2. The combination of the drum M, frame X, adapted to carry a spool, andweight II, having wedge-shaped d etent 71, with the latch I, pivotedlever Q, roll 0, provided with wedge o, tripping-arm 'I, and means forsupporting roll and adjusting it up and down, substantially asdescribed, and for the purposes set forth.

3. In the stop-motion of a doubling mechanism, the drum )1, the frame X,adapted to carry a spool, a rotatory trip 0, having wedge 0, alsosupported by said frame, and. means for adjusting the spool and trip toand from each other in a right line, in combination with arm I, weightll, latch therefor, and means intermediate said arm and said latch fordisengaging the latter from the weight, substantially as described, andfor the purposes set forth.

ROBERT DAXVSON.

In presence o[ J'osnm-I 'B. Jonxsmv, James CONNOR.

